Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/dtor/input.git manually

[linux-2.6-omap-h63xx.git] / arch / um / kernel / trap_kern.c

diff --git a/arch/um/kernel/trap_kern.c b/arch/um/kernel/trap_kern.c
index 54e2ec33a43c028f517dd7eda1b53d270c790d49..c20aef120598ddb071f6362ca8868ecdc8373eca 100644 (file)
--- a/arch/um/kernel/trap_kern.c
+++ b/arch/um/kernel/trap_kern.c
@@ -23,7 +23,6 @@
 #include "kern.h"
 #include "chan_kern.h"
 #include "mconsole_kern.h"
-#include "2_5compat.h"
 #include "mem.h"
 #include "mem_kern.h"
 
@@ -48,7 +47,7 @@ int handle_page_fault(unsigned long address, unsigned long ip,
                goto good_area;
        else if(!(vma->vm_flags & VM_GROWSDOWN)) 
                goto out;
-       else if(!ARCH_IS_STACKGROW(address))
+       else if(is_user && !ARCH_IS_STACKGROW(address))
                goto out;
        else if(expand_stack(vma, address)) 
                goto out;
@@ -57,10 +56,11 @@ int handle_page_fault(unsigned long address, unsigned long ip,
        *code_out = SEGV_ACCERR;
        if(is_write && !(vma->vm_flags & VM_WRITE)) 
                goto out;
+
+        if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
+                goto out;
+
        page = address & PAGE_MASK;
-       pgd = pgd_offset(mm, page);
-       pud = pud_offset(pgd, page);
-       pmd = pmd_offset(pud, page);
        do {
  survive:
                switch (handle_mm_fault(mm, vma, address, is_write)){
@@ -106,33 +106,6 @@ out_of_memory:
        goto out;
 }
 
-LIST_HEAD(physmem_remappers);
-
-void register_remapper(struct remapper *info)
-{
-       list_add(&info->list, &physmem_remappers);
-}
-
-static int check_remapped_addr(unsigned long address, int is_write)
-{
-       struct remapper *remapper;
-       struct list_head *ele;
-       __u64 offset;
-       int fd;
-
-       fd = phys_mapping(__pa(address), &offset);
-       if(fd == -1)
-               return(0);
-
-       list_for_each(ele, &physmem_remappers){
-               remapper = list_entry(ele, struct remapper, list);
-               if((*remapper->proc)(fd, address, is_write, offset))
-                       return(1);
-       }
-
-       return(0);
-}
-
 /*
  * We give a *copy* of the faultinfo in the regs to segv.
  * This must be done, since nesting SEGVs could overwrite
@@ -151,8 +124,6 @@ unsigned long segv(struct faultinfo fi, unsigned long ip, int is_user, void *sc)
                 flush_tlb_kernel_vm();
                 return(0);
         }
-       else if(check_remapped_addr(address & PAGE_MASK, is_write))
-               return(0);
        else if(current->mm == NULL)
                panic("Segfault with no mm");
        err = handle_page_fault(address, ip, is_write, is_user, &si.si_code);